fn, a Fortran90 code which evaluates elementary and special functions using Chebyshev polynomials, including Airy, Bessel I, Bessel J, Bessel K, Bessel Y, beta, confluent hypergeometric, cosine integral, Dawson's integral, digamma (psi), error, exponential integral, gamma, hyperbolic cosine integral, hyperbolic sine integral, incomplete gamma, log gamma, logarithmic integral, Pochhammer, psi, sine integral, Spence integral, by Wayne Fullerton.
The original, true, correct code is available through NETLIB: https://www.netlib.org/fn/index.html.
The information on this web page is distributed under the MIT license.
fn is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.
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